i need explain

ibrahimha7 (2)
I have code it run okay .

but I need explain first what is difference between
int Y and Z

and I need to know how the code run 

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  #include<iostream>
using namespace std;


int main()
{
	int x;
	int y;
	int a[10];
	int z;

	
	for (y = 0; y <= 10; y++)
	{

		cout << "welcome to airlaine resvition system ";
		cout << "\n plase press 1 for first class or 2 for economy class";
		cin >> x;
		do
		{
			
				cout << "Pick a seat in First class ";
				cin >> a[y];
				for (z = 0; z<y; z++) if (a[y] == a[z]) {
					cout << "Seat taken. ";
					
				}
			} while (z != y);
			if (a[y] <= 5)
			{

				cout << "your seats in firs class is " << a[y];

			}
			else
			{
				cout << "wrong number";
			}

			do {
				cout << "Pick a seat in economy class ";
				cin >> a[y];
				for (z = 0; z<y; z++) if (a[y] == a[z]) {
					cout << "\nSeat taken!!! ";

				}
			} while (z != y);
			if (5< a[y] <10 )
			{

				cout << "\nyour seats in firs class is " << a[y];

			}
			else
			{
				cout << "\nwrong number";
			}

		}


	
}
chicofeo (640)
Did you write the code?
ibrahimha7 (2)
no, the code give us to explain ,, I understand all ,but the Z I don't know reason why in this code.
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